2 Corinthians 10:8For even if I boast somewhat excessively about the authority the Lord gave us for building you up rather than tearing you down, I will not be ashamed.

2 Corinthians 10:10For some say, "His letters are weighty and forceful, but his physical presence is unimpressive, and his speaking is of no account."

Treasury of Scripture

That I may not seem as if I would terrify you by letters.

terrify.

2 Corinthians 10:10 For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.

1 Corinthians 4:5,19-21 Therefore judge nothing before the time, until the Lord come, who both will bring to light the hidden things of darkness, and will make manifest the counsels of the hearts: and then shall every man have praise of God…

Lexicon

I do not want to seemδόξω(doxō)Verb - Aorist Subjunctive Active - 1st Person SingularStrong's Greek 1380: A prolonged form of a primary verb, doko dok'-o of the same meaning; to think; by implication, to seem.

to beὡς(hōs)AdverbStrong's Greek 5613: Probably adverb of comparative from hos; which how, i.e. In that manner.

(9) That I may not seem as if I would terrify you by letters.--The logical sequence of thought is: "I say this" (i.e., that my sentence of delivery to Satan will not be a hollow form) "in order that I may not seem to frighten you as with a bug-bear." This, it is clear from what follows, had been said. (Comp. the sneer in the next verse.) The use of the plural in this verse and that which follows is in favour of the hypothesis of a lost letter being referred to in 1Corinthians 5:9, but does not absolutely prove it.